def ask_for_count(peer):
peers=tools.local_get('peers')
block_count = cmd(peer, {'type': 'blockCount'})
if not isinstance(block_count, dict):
return
if 'error' in block_count.keys():
return
peers[peer]['length']=block_count['length']
tools.local_put('peers', peers)
def ask_for_count(peer):
peers = tools.local_get('peers')
block_count = cmd(peer, {'type': 'blockCount'})
if not isinstance(block_count, dict):
return
if 'error' in block_count.keys():
return
peers[peer]['length'] = block_count['length']
tools.local_put('peers', peers)
def add_tx(tx, DB={}):
# Attempt to add a new transaction into the pool.
#print('top of add_tx')
out = ['']
if type(tx) != type({'a': 1}):
return False
address = tools.make_address(tx['pubkeys'], len(tx['signatures']))
'''
def verify_count(tx, txs):
return tx['count'] != tools.count(address, DB)
'''
def type_check(tx, txs):
if not tools.E_check(tx, 'type', [str, unicode]):
out[0] += 'blockchain type'
return False
if tx['type'] not in transactions.tx_check:
out[0] += 'bad type'
return False
return True
def too_big_block(tx, txs):
return len(
tools.package(txs + [tx])) > networking.MAX_MESSAGE_SIZE - 5000
def verify_tx(tx, txs, out):
#do not allow tx which fail to reference one of the 10 most recent blocks. do not allow tx which have an identical copy in the last 10 blocks.
if not type_check(tx, txs):
out[0] += 'type error'
return False
if tx in txs:
out[0] += 'no duplicates'
return False
#if verify_count(tx, txs):
# out[0]+='count error'
# return False
if too_big_block(tx, txs):
out[0] += 'too many txs'
return False
if not transactions.tx_check[tx['type']](tx, txs, out, DB):
out[0] += 'tx: ' + str(tx)
return False
return True
#tools.log('attempt to add tx: ' +str(tx))
T = tools.local_get('txs')
if verify_tx(tx, T, out):
T.append(tx)
tools.local_put('txs', T)
return ('added tx: ' + str(tx))
else:
return ('failed to add tx because: ' + out[0])
def get_val(length):
leng = str(length)
if not leng in storage:
block=tools.db_get(leng)
if block==db.default_entry():
if leng==tools.local_get('length'):
tools.local_put('length', int(leng)-1)
block=tools.db_get(leng)
else:
error()
#try:
storage[leng] = tools.db_get(leng)[key[:-1]]
tools.db_put(key, storage)
return storage[leng]
def get_val(length):
leng = str(length)
if not leng in storage:
block = tools.db_get(leng)
if block == db.default_entry():
if leng == tools.local_get('length'):
tools.local_put('length', int(leng) - 1)
block = tools.db_get(leng)
else:
error()
#try:
storage[leng] = tools.db_get(leng)[key[:-1]]
tools.db_put(key, storage)
return storage[leng]
def create_sign_tx():
on_block=tools.local_get('length')+1
if on_block==0:
time.sleep(1)
return{'error':'not ready'}
r=tools.det_random(on_block)
jackpots=[]
address=tools.local_get('address')
l=max(-1, on_block-1-(custom.long_time*2-custom.medium_time))
election_block=tools.db_get(l+1)
proof=tools.local_get('balance_proofs'+str(l))
if 'root_hash' not in election_block:
return({'error':'database changed'})
a=tools.db_verify(election_block['root_hash'], address, proof)
if a==False:
#tools.log('election block: ' +str(election_block))
#tools.log('proof: ' +str(proof))
return({'error':'not valid proof'})
old_balance=a['amount']
M=custom.all_money
for j in range(custom.jackpot_nonces):
if tools.winner(old_balance, M, r, address, j):
jackpots.append(j)
if len(jackpots)>0:
tx={'on_block':on_block, 'jackpots':jackpots, 'type':'sign', 'amount':M/3000/3}
tx['B']=old_balance
tx['proof']=proof
if proof=='empty':
time.sleep(1)
return {'error':'not ready'}
secrets=tools.local_get('secrets')
if str(on_block) in secrets:
secret=secrets[str(on_block)]
else:
secret=tools.unpackage(tools.package({'salt':str(random.random())+str(random.random()), 'entropy':random.randint(0,1)}))
secrets[str(on_block)]=secret
tools.local_put('secrets', secrets)
tx['secret_hash']=tools.det_hash(secret)
if on_block>0:
block=tools.db_get(on_block-1)
if 'amount' in block and block['amount']==0:
return({'error':'database changed'})
#tools.log('on_block: ' +str(a))
tx['prev']=block['block_hash']
else:
tx= {'error':'no jackpots'}
return tx
def add_tx(tx, DB={}):
# Attempt to add a new transaction into the pool.
#print('top of add_tx')
out=['']
if type(tx) != type({'a':1}):
return False
address = tools.make_address(tx['pubkeys'], len(tx['signatures']))
'''
def verify_count(tx, txs):
return tx['count'] != tools.count(address, DB)
'''
def type_check(tx, txs):
if not tools.E_check(tx, 'type', [str, unicode]):
out[0]+='blockchain type'
return False
if tx['type'] not in transactions.tx_check:
out[0]+='bad type'
return False
return True
def too_big_block(tx, txs):
return len(tools.package(txs+[tx])) > networking.MAX_MESSAGE_SIZE - 5000
def verify_tx(tx, txs, out):
#do not allow tx which fail to reference one of the 10 most recent blocks. do not allow tx which have an identical copy in the last 10 blocks.
if not type_check(tx, txs):
out[0]+='type error'
return False
if tx in txs:
out[0]+='no duplicates'
return False
#if verify_count(tx, txs):
# out[0]+='count error'
# return False
if too_big_block(tx, txs):
out[0]+='too many txs'
return False
if not transactions.tx_check[tx['type']](tx, txs, out, DB):
out[0]+= 'tx: ' + str(tx)
return False
return True
#tools.log('attempt to add tx: ' +str(tx))
T=tools.local_get('txs')
if verify_tx(tx, T, out):
T.append(tx)
tools.local_put('txs', T)
return('added tx: ' +str(tx))
else:
return('failed to add tx because: '+out[0])
def main_once(DB):
pr=tools.local_get('peers')
keys=filter(lambda x: pr[x]['blacklist']<500, pr.keys())
keys=sorted(keys, key=lambda r: pr[r]['lag'])
if len(keys)<1:
time.sleep(0.5)
return
time.sleep(0.05)
while not DB['suggested_blocks'].empty():
time.sleep(0.1)
if tools.local_get('stop'): return 0
i=exponential_random(9.0/10)%len(keys)
t1=time.time()
r=peer_check(keys[i], DB)
t2=time.time()
a=0.5
pr=tools.local_get('peers')
pr[keys[i]]['lag']*=(1-a)
if r==0: a*=(t2-t1)
else:
a*=60
pr[keys[i]]['lag']+=a
tools.local_put('peers', pr)
def main_once(DB):
pr = tools.local_get('peers')
keys = filter(lambda x: pr[x]['blacklist'] < 500, pr.keys())
keys = sorted(keys, key=lambda r: pr[r]['lag'])
if len(keys) < 1:
time.sleep(0.5)
return
time.sleep(0.05)
while not DB['suggested_blocks'].empty():
time.sleep(0.1)
if tools.local_get('stop'): return 0
i = exponential_random(9.0 / 10) % len(keys)
t1 = time.time()
r = peer_check(keys[i], DB)
t2 = time.time()
a = 0.5
pr = tools.local_get('peers')
pr[keys[i]]['lag'] *= (1 - a)
if r == 0: a *= (t2 - t1)
else:
a *= 60
pr[keys[i]]['lag'] += a
tools.local_put('peers', pr)
def main(brainwallet, pubkey_flag=False):
DB = custom.DB
tools.log('custom.current_loc: ' + str(custom.current_loc))
print('starting full node')
if not pubkey_flag:
privkey = tools.det_hash(brainwallet)
pubkey = tools.privtopub(privkey)
else:
pubkey = brainwallet
a = tools.empty_peer()
b = custom.peers
#b[tools.getPublicIp()+':'+str(custom.port)]=a
processes = [
{
'target':
db.main,
'args': (DB['heart_queue'], custom.database_name, tools.log,
custom.database_port),
'name':
'db'
},
{
'target': auto_signer.mainloop,
'args': (),
'name': 'auto_signer'
},
{
'target': reward_collector.doit,
'args': (),
'name': 'auto_signer'
},
#{'target':tools.heart_monitor,
# 'args':(DB['heart_queue'], ),
# 'name':'heart_monitor'},
{
'target': blockchain.main,
'args': (DB, ),
'name': 'blockchain'
},
{
'target': api.main,
'args': (DB, DB['heart_queue']),
'name': 'api'
},
{
'target': peers_check.main,
'args': (b, DB),
'name': 'peers_check'
},
{
'target': networking.serve_forever,
'args': (peer_recieve_func, custom.port, DB['heart_queue'], True),
'name': 'peer_recieve'
}
]
cmds = []
cmd = multiprocessing.Process(**processes[0])
cmd.start()
cmds.append(cmd)
tools.log('starting ' + cmd.name)
time.sleep(4)
b = tools.db_existence(0)
#def empty_memoized(): return({'blockcount':-3000})
if not b:
tools.local_put('length', -1)
tools.local_put('height', -1)
tools.local_put('memoized_votes', {})
tools.local_put('txs', [])
tools.local_put('peers', {})
tools.local_put('targets', {})
tools.local_put('times', {})
tools.local_put('mine', False)
tools.local_put('my_sign_txs', {}) #empty_memoized())
tools.local_put('secrets', {})
money = db.default_entry()
money['amount'] += custom.all_money
tools.db_put(custom.creator, money)
tools.local_put('stop', False)
tools.log('stop: ' + str(tools.local_get('stop')))
for process in processes[1:]:
cmd = multiprocessing.Process(**process)
cmd.start()
cmds.append(cmd)
tools.log('starting ' + cmd.name)
if not pubkey_flag:
tools.local_put('privkey', privkey)
else:
tools.local_put('privkey', 'Default')
Address = tools.make_address([pubkey], 1)
tools.local_put('address', Address)
a = tools.db_proof(Address)
tools.local_put('balance_proofs-1', a)
tools.log('stop: ' + str(tools.local_get('stop')))
while not tools.local_get('stop'):
time.sleep(0.5)
tools.log('about to stop threads')
DB['heart_queue'].put('stop')
for p in [[custom.port, '127.0.0.1'], [custom.api_port, '127.0.0.1']]:
networking.connect('stop', p[0], p[1])
cmds.reverse()
for cmd in cmds[:-1]:
cmd.join()
tools.log('stopped a thread: ' + str(cmd))
time.sleep(2)
networking.connect('stop', custom.database_port, '127.0.0.1')
cmds[-1].join()
tools.log('stopped a thread: ' + str(cmds[-1]))
tools.log('all threads stopped')
sys.exit(0)
def add_block(block_pair, recent_hashes, DB={}):
"""Attempts adding a new block to the blockchain.
Median is good for weeding out liars, so long as the liars don't have 51%
hashpower. """
def median(mylist):
if len(mylist) < 1:
return 0
return sorted(mylist)[len(mylist) / 2]
def block_check(block, DB):
def log_(txt): pass #return tools.log(txt)
def tx_check(txs):
start = copy.deepcopy(txs)
out = []
start_copy = []
invalid_because = ['']
while start != start_copy:
if start == []:
return False # Block passes this test
start_copy = copy.deepcopy(start)
if transactions.tx_check[start[0]['type']](start[0], out, invalid_because, DB):
out.append(start.pop())
else:
tools.log('invalid tx: '+str(invalid_because[0]))
return True # Block is invalid
tools.log('block invalid because it has no txs')
return True # Block is invalid
if 'error' in block:
log_('error in block')
return False
length =tools.local_get('length')
if type(block['length'])!=type(1):
log_('wrong length type')
return False
if int(block['length']) != int(length) + 1:
log_('wrong longth')
return False
block_creator_address=tools.addr(block)
mint_address=tools.addr(filter(lambda t: t['type']=='mint', block['txs'])[0])
if block_creator_address!=mint_address:
log_('bad mint')
return False
if block['root_hash']!=tools.db_root():
log_('bad root, have: '+str(tools.db_root())+' need ' +str(block['root_hash']))
return False
txs=filter(lambda x: x['type']=='mint', block['txs'])
if len(txs)!=1:
log_('wrong number of mint txs')
return False
txs=filter(lambda x: x['type']=='sign', block['txs'])
txs=map(lambda x: len(x['jackpots']), txs)
if sum(txs)<custom.signers*2/3 and length>-1:
log_('not enough signatures')
return False
if length >= 0:
prev_block=tools.db_get(length)
to_hash={'prev_hash':prev_block['block_hash'], 'txs':block['txs']}
if not block['block_hash']==tools.det_hash(to_hash):
log_('det hash error')
return False
#total money spent must be less than the total amount of money in signed deposits for this block.
if tx_check(block['txs']):
log_('tx check')
return False
return True
if type(block_pair)==type([1,2,3]):
block=block_pair[0]
peer=block_pair[1]
else:
block=block_pair
peer=False
if 'block_hash' in block and block['block_hash'] in recent_hashes:
#tools.log('we already have that block:' +str(block))
return 0
#tools.log('attempt to add block: ' +str(block))
if block_check(block, DB):
#tools.log('add_block: ' + str(block))
tools.db_put(block['length'], block, DB)
tools.local_put('height', block['height'])
#take money from the creator
tools.local_put('length', block['length'])
orphans = tools.local_get('txs')
orphans=filter(lambda t: t['type']!='mint', orphans)
tools.local_put('txs', [])
for tx in block['txs']:
try:
transactions.update[tx['type']](tx, DB, True)
except Exception as exc:
tools.log('blockchain broke while adding block. Current datafiles are probably corrupted, and should be deleted.')
tools.log(exc)
error()
for tx in orphans:
add_tx(tx, DB)
peers=tools.local_get('peers')
if peer!=False and peers[peer]['blacklist']>0:
peers[peer]['blacklist']-=1
tools.local_put('peers', peers)#root hash written on the block is for the state before that block
tools.local_put('balance_proofs'+str(block['length']),tools.db_proof(tools.local_get('address')))
return
elif not peer==False:
peers=tools.local_get('peers')
if peer not in peers:
peers[peer]=tools.empty_peer()
peers[peer]['blacklist']+=1
def main(brainwallet, pubkey_flag=False):
DB=custom.DB
tools.log('custom.current_loc: ' +str(custom.current_loc))
print('starting full node')
if not pubkey_flag:
privkey=tools.det_hash(brainwallet)
pubkey=tools.privtopub(privkey)
else:
pubkey=brainwallet
a=tools.empty_peer()
b=custom.peers
#b[tools.getPublicIp()+':'+str(custom.port)]=a
processes= [
{'target': db.main,
'args': (DB['heart_queue'], custom.database_name, tools.log, custom.database_port),
'name': 'db'},
{'target': auto_signer.mainloop,
'args': (),
'name': 'auto_signer'},
{'target': reward_collector.doit,
'args': (),
'name': 'auto_signer'},
#{'target':tools.heart_monitor,
# 'args':(DB['heart_queue'], ),
# 'name':'heart_monitor'},
{'target': blockchain.main,
'args': (DB,),
'name': 'blockchain'},
{'target': api.main,
'args': (DB, DB['heart_queue']),
'name': 'api'},
{'target': peers_check.main,
'args': (b, DB),
'name': 'peers_check'},
{'target': networking.serve_forever,
'args': (peer_recieve_func, custom.port, DB['heart_queue'], True),
'name': 'peer_recieve'}
]
cmds=[]
cmd=multiprocessing.Process(**processes[0])
cmd.start()
cmds.append(cmd)
tools.log('starting '+cmd.name)
time.sleep(4)
b=tools.db_existence(0)
#def empty_memoized(): return({'blockcount':-3000})
if not b:
tools.local_put('length', -1)
tools.local_put('height', -1)
tools.local_put('memoized_votes', {})
tools.local_put('txs', [])
tools.local_put('peers', {})
tools.local_put('targets', {})
tools.local_put('times', {})
tools.local_put('mine', False)
tools.local_put('my_sign_txs', {})#empty_memoized())
tools.local_put('secrets', {})
money=db.default_entry()
money['amount']+=custom.all_money
tools.db_put(custom.creator, money)
tools.local_put('stop', False)
tools.log('stop: ' +str(tools.local_get('stop')))
for process in processes[1:]:
cmd=multiprocessing.Process(**process)
cmd.start()
cmds.append(cmd)
tools.log('starting '+cmd.name)
if not pubkey_flag:
tools.local_put('privkey', privkey)
else:
tools.local_put('privkey', 'Default')
Address=tools.make_address([pubkey], 1)
tools.local_put('address', Address)
a=tools.db_proof(Address)
tools.local_put('balance_proofs-1', a)
tools.log('stop: ' +str(tools.local_get('stop')))
while not tools.local_get('stop'):
time.sleep(0.5)
tools.log('about to stop threads')
DB['heart_queue'].put('stop')
for p in [[custom.port, '127.0.0.1'],
[custom.api_port, '127.0.0.1']]:
networking.connect('stop', p[0], p[1])
cmds.reverse()
for cmd in cmds[:-1]:
cmd.join()
tools.log('stopped a thread: '+str(cmd))
time.sleep(2)
networking.connect('stop', custom.database_port, '127.0.0.1')
cmds[-1].join()
tools.log('stopped a thread: '+str(cmds[-1]))
tools.log('all threads stopped')
sys.exit(0)
def add_block(block_pair, recent_hashes, DB={}):
"""Attempts adding a new block to the blockchain.
Median is good for weeding out liars, so long as the liars don't have 51%
hashpower. """
def median(mylist):
if len(mylist) < 1:
return 0
return sorted(mylist)[len(mylist) / 2]
def block_check(block, DB):
def log_(txt):
pass #return tools.log(txt)
def tx_check(txs):
start = copy.deepcopy(txs)
out = []
start_copy = []
invalid_because = ['']
while start != start_copy:
if start == []:
return False # Block passes this test
start_copy = copy.deepcopy(start)
if transactions.tx_check[start[0]['type']](start[0], out,
invalid_because,
DB):
out.append(start.pop())
else:
tools.log('invalid tx: ' + str(invalid_because[0]))
return True # Block is invalid
tools.log('block invalid because it has no txs')
return True # Block is invalid
if 'error' in block:
log_('error in block')
return False
length = tools.local_get('length')
if type(block['length']) != type(1):
log_('wrong length type')
return False
if int(block['length']) != int(length) + 1:
log_('wrong longth')
return False
block_creator_address = tools.addr(block)
mint_address = tools.addr(
filter(lambda t: t['type'] == 'mint', block['txs'])[0])
if block_creator_address != mint_address:
log_('bad mint')
return False
if block['root_hash'] != tools.db_root():
log_('bad root, have: ' + str(tools.db_root()) + ' need ' +
str(block['root_hash']))
return False
txs = filter(lambda x: x['type'] == 'mint', block['txs'])
if len(txs) != 1:
log_('wrong number of mint txs')
return False
txs = filter(lambda x: x['type'] == 'sign', block['txs'])
txs = map(lambda x: len(x['jackpots']), txs)
if sum(txs) < custom.signers * 2 / 3 and length > -1:
log_('not enough signatures')
return False
if length >= 0:
prev_block = tools.db_get(length)
to_hash = {
'prev_hash': prev_block['block_hash'],
'txs': block['txs']
}
if not block['block_hash'] == tools.det_hash(to_hash):
log_('det hash error')
return False
#total money spent must be less than the total amount of money in signed deposits for this block.
if tx_check(block['txs']):
log_('tx check')
return False
return True
if type(block_pair) == type([1, 2, 3]):
block = block_pair[0]
peer = block_pair[1]
else:
block = block_pair
peer = False
if 'block_hash' in block and block['block_hash'] in recent_hashes:
#tools.log('we already have that block:' +str(block))
return 0
#tools.log('attempt to add block: ' +str(block))
if block_check(block, DB):
#tools.log('add_block: ' + str(block))
tools.db_put(block['length'], block, DB)
tools.local_put('height', block['height'])
#take money from the creator
tools.local_put('length', block['length'])
orphans = tools.local_get('txs')
orphans = filter(lambda t: t['type'] != 'mint', orphans)
tools.local_put('txs', [])
for tx in block['txs']:
try:
transactions.update[tx['type']](tx, DB, True)
except Exception as exc:
tools.log(
'blockchain broke while adding block. Current datafiles are probably corrupted, and should be deleted.'
)
tools.log(exc)
error()
for tx in orphans:
add_tx(tx, DB)
peers = tools.local_get('peers')
if peer != False and peers[peer]['blacklist'] > 0:
peers[peer]['blacklist'] -= 1
tools.local_put(
'peers', peers
) #root hash written on the block is for the state before that block
tools.local_put('balance_proofs' + str(block['length']),
tools.db_proof(tools.local_get('address')))
return
elif not peer == False:
peers = tools.local_get('peers')
if peer not in peers:
peers[peer] = tools.empty_peer()
peers[peer]['blacklist'] += 1
def stop_(DB, args):
tools.local_put('stop', True)
return ('turning off all threads')
def stop_(DB, args):
tools.local_put('stop', True)
return('turning off all threads')
def add_tx(tx, DB={}):
# Attempt to add a new transaction into the pool.
#print('top of add_tx')
out=['']
if type(tx) != type({'a':1}):
return False
address = tools.make_address(tx['pubkeys'], len(tx['signatures']))
'''
def verify_count(tx, txs):
return tx['count'] != tools.count(address, DB)
'''
def repeat_check(tx, txs):
l=tools.local_get('length')
if l<=1: return True
h=tx['recent_hash']
r=range(l-10, l)
r=filter(lambda l: l>0, r)
recent_blocks=map(lambda x:tools.db_get(x), r)
recent_hashes=map(lambda x: x['block_hash'], recent_blocks)
if h not in recent_hashes:
tools.log('have : ' +str(h))
tools.log('need: ' +str(recent_hashes))
tools.log('recent hash error')
return False
recent_txs=[]
for block in recent_blocks:
recent_txs+=block['txs']
def f(d):
d=copy.deepcopy(d)
d.pop('signatures')
return tools.det_hash(d)
if f(tx) in map(f, recent_txs):
tools.log('no repeated tx')
return False
return True
def type_check(tx, txs):
if not tools.E_check(tx, 'type', [str, unicode]):
out[0]+='blockchain type'
return False
if tx['type'] not in transactions.tx_check:
out[0]+='bad type'
return False
return True
def too_big_block(tx, txs):
return len(tools.package(txs+[tx])) > networking.MAX_MESSAGE_SIZE - 5000
def verify_tx(tx, txs, out):
#do not allow tx which fail to reference one of the 10 most recent blocks. do not allow tx which have an identical copy in the last 10 blocks.
if not type_check(tx, txs):
out[0]+='type error'
return False
if tx in txs:
out[0]+='no duplicates'
return False
#if verify_count(tx, txs):
# out[0]+='count error'
# return False
if too_big_block(tx, txs):
out[0]+='too many txs'
return False
if not tools.fee_check(tx, txs, DB):
out[0]+='not enough money: ' +str(tx)
return False
if not tools.signature_check(tx):
out[0]+='bad signature: ' +str(tx)
return False
if not transactions.tx_check[tx['type']](tx, txs, out, DB):
out[0]+= 'tx: ' + str(tx)
return False
return True
#tools.log('attempt to add tx: ' +str(tx))
T=tools.local_get('txs')
try:
if verify_tx(tx, T, out):
T.append(tx)
tools.local_put('txs', T)
return('added tx: ' +str(tx))
else:
return('failed to add tx because: '+out[0])
except Exception as exc:
tools.log(exc)
return('failed to add tx because an error occured while adding tx')
def add_tx(tx, DB={}):
# Attempt to add a new transaction into the pool.
#print('top of add_tx')
out = ['']
if type(tx) != type({'a': 1}):
return False
address = tools.make_address(tx['pubkeys'], len(tx['signatures']))
'''
def verify_count(tx, txs):
return tx['count'] != tools.count(address, DB)
'''
def repeat_check(tx, txs):
l = tools.local_get('length')
if l <= 1: return True
h = tx['recent_hash']
r = range(l - 10, l)
r = filter(lambda l: l > 0, r)
recent_blocks = map(lambda x: tools.db_get(x), r)
recent_hashes = map(lambda x: x['block_hash'], recent_blocks)
if h not in recent_hashes:
tools.log('have : ' + str(h))
tools.log('need: ' + str(recent_hashes))
tools.log('recent hash error')
return False
recent_txs = []
for block in recent_blocks:
recent_txs += block['txs']
def f(d):
d = copy.deepcopy(d)
d.pop('signatures')
return tools.det_hash(d)
if f(tx) in map(f, recent_txs):
tools.log('no repeated tx')
return False
return True
def type_check(tx, txs):
if not tools.E_check(tx, 'type', [str, unicode]):
out[0] += 'blockchain type'
return False
if tx['type'] not in transactions.tx_check:
out[0] += 'bad type'
return False
return True
def too_big_block(tx, txs):
return len(
tools.package(txs + [tx])) > networking.MAX_MESSAGE_SIZE - 5000
def verify_tx(tx, txs, out):
#do not allow tx which fail to reference one of the 10 most recent blocks. do not allow tx which have an identical copy in the last 10 blocks.
if not type_check(tx, txs):
out[0] += 'type error'
return False
if tx in txs:
out[0] += 'no duplicates'
return False
#if verify_count(tx, txs):
# out[0]+='count error'
# return False
if too_big_block(tx, txs):
out[0] += 'too many txs'
return False
if not tools.fee_check(tx, txs, DB):
out[0] += 'not enough money: ' + str(tx)
return False
if not tools.signature_check(tx):
out[0] += 'bad signature: ' + str(tx)
return False
if not transactions.tx_check[tx['type']](tx, txs, out, DB):
out[0] += 'tx: ' + str(tx)
return False
return True
#tools.log('attempt to add tx: ' +str(tx))
T = tools.local_get('txs')
try:
if verify_tx(tx, T, out):
T.append(tx)
tools.local_put('txs', T)
return ('added tx: ' + str(tx))
else:
return ('failed to add tx because: ' + out[0])
except Exception as exc:
tools.log(exc)
return ('failed to add tx because an error occured while adding tx')
def delete_block(DB):
""" Removes the most recent block from the blockchain. """
length=tools.local_get('length')
if length < 0:
return
try:
ts=tools.local_get('targets')
ts.pop(str(length))
tools.local_put('targets', ts)
except:
pass
try:
ts=tools.local_get('times')
ts.pop(str(length))
tools.local_put('times', ts)
except:
pass
block = tools.db_get(length, DB)
orphans = tools.local_get('txs')
orphans=filter(lambda t: t['type']!='mint', orphans)
tools.local_put('txs', [])
for tx in block['txs']:
orphans.append(tx)
tools.local_put('add_block', False)
transactions.update[tx['type']](tx, DB, False)
tools.db_delete(length, DB)
length-=1
tools.local_put('length', length)
if length>=0:
block=tools.db_get(length)
tools.local_put('height', filter(lambda t: t['type']=='mint', block['txs'])[0]['height'])
else:
tools.local_put('height', -1)
for orphan in orphans:
add_tx(orphan, DB)
def delete_block(DB):
""" Removes the most recent block from the blockchain. """
length = tools.local_get('length')
if length < 0:
return
try:
ts = tools.local_get('targets')
ts.pop(str(length))
tools.local_put('targets', ts)
except:
pass
try:
ts = tools.local_get('times')
ts.pop(str(length))
tools.local_put('times', ts)
except:
pass
block = tools.db_get(length, DB)
orphans = tools.local_get('txs')
orphans = filter(lambda t: t['type'] != 'mint', orphans)
tools.local_put('txs', [])
for tx in block['txs']:
orphans.append(tx)
tools.local_put('add_block', False)
transactions.update[tx['type']](tx, DB, False)
tools.db_delete(length, DB)
length -= 1
tools.local_put('length', length)
if length >= 0:
block = tools.db_get(length)
tools.local_put(
'height',
filter(lambda t: t['type'] == 'mint', block['txs'])[0]['height'])
else:
tools.local_put('height', -1)
for orphan in orphans:
add_tx(orphan, DB)
def stop_(DB, args):
tools.local_put("stop", True)
return "turning off all threads"